Figure 5

Power when the log odds ratio θ=3. Comparison of power for the three tests Qγ (solid line), BD (dot-dash), and \(Q_{{\chi }^{2}}\) (dash) plotted against τ, the square root of the random variance component τ2. Here all studies have the parameters: 90 subjects in each study with equal arms of 45 each (N=90 and q=1/2) and the log odds ratio θ=3.